quagmire
         n 1: a soft wet area of low-lying land that sinks underfoot
               [syn: {mire}, {quagmire}, {quag}, {morass}, {slack}]

English Dictionary: quickener	by the DICT Development Group
From WordNet (r) 3.0 (2006) [wn]:
Quassia amara n handsome South American shrub or small tree having bright scarlet flowers and yielding a valuable fine-grained yellowish wood; yields the bitter drug quassia from its wood and bark Synonym(s): quassia, bitterwood, Quassia amara
From WordNet (r) 3.0 (2006) [wn]:
quick march n marching at quick time
From WordNet (r) 3.0 (2006) [wn]:
quickener n an agent that gives or restores life or vigor; "the soul is the quickener of the body" Synonym(s): quickener, invigorator, enlivener
From Webster's Revised Unabridged Dictionary (1913) [web1913]:
Quagmire \Quag"mire`\, n. [Quake + mire.]       Soft, wet, miry land, which shakes or yields under the feet.       [bd]A spot surrounded by quagmires, which rendered it       difficult of access.[b8] --Palfrey.          Syn: Morass; marsh; bog; swamp; fen; slough.
From Webster's Revised Unabridged Dictionary (1913) [web1913]:
Quassia \Quas"si*a\, n. [NL. From the name of a negro, Quassy,       or Quash, who prescribed this article as a specific.]       The wood of several tropical American trees of the order       {Simarube[91]}, as {Quassia amara}, {Picr[91]na excelsa}, and       {Simaruba amara}. It is intensely bitter, and is used in       medicine and sometimes as a substitute for hops in making       beer.
From Webster's Revised Unabridged Dictionary (1913) [web1913]:
Quickener \Quick"en*er\, n.       One who, or that which, quickens.